<?php

/*
 * This file is part of SwiftMailer.
 * (c) 2004-2009 Chris Corbyn
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * A Simple MIME Header.
 *
 * @package    Swift
 * @subpackage Mime
 * @author     Chris Corbyn
 */
class Swift_Mime_Headers_UnstructuredHeader extends Swift_Mime_Headers_AbstractHeader
{
	/**
	 * The value of this Header.
	 *
	 * @var string
	 */
	private $_value;

	/**
	 * Creates a new SimpleHeader with $name.
	 *
	 * @param string $name
	 * @param Swift_Mime_HeaderEncoder $encoder
	 * @param Swift_Mime_Grammar $grammar
	 */
	public function __construct($name, Swift_Mime_HeaderEncoder $encoder, Swift_Mime_Grammar $grammar)
	{
		$this->setFieldName($name);
		$this->setEncoder($encoder);
		parent::__construct($grammar);
	}

	/**
	 * Get the type of Header that this instance represents.
	 *
	 * @see TYPE_TEXT, TYPE_PARAMETERIZED, TYPE_MAILBOX
	 * @see TYPE_DATE, TYPE_ID, TYPE_PATH
	 *
	 * @return int
	 */
	public function getFieldType()
	{
		return self::TYPE_TEXT;
	}

	/**
	 * Set the model for the field body.
	 *
	 * This method takes a string for the field value.
	 *
	 * @param string $model
	 */
	public function setFieldBodyModel($model)
	{
		$this->setValue($model);
	}

	/**
	 * Get the model for the field body.
	 *
	 * This method returns a string.
	 *
	 * @return string
	 */
	public function getFieldBodyModel()
	{
		return $this->getValue();
	}

	/**
	 * Get the (unencoded) value of this header.
	 *
	 * @return string
	 */
	public function getValue()
	{
		return $this->_value;
	}

	/**
	 * Set the (unencoded) value of this header.
	 *
	 * @param string $value
	 */
	public function setValue($value)
	{
		$this->clearCachedValueIf($this->_value != $value);
		$this->_value = $value;
	}

	/**
	 * Get the value of this header prepared for rendering.
	 *
	 * @return string
	 */
	public function getFieldBody()
	{
		if (!$this->getCachedValue()) {
			$this->setCachedValue(
				$this->encodeWords($this, $this->_value)
			);
		}

		return $this->getCachedValue();
	}
}
